Disclaimer: I don't own Kamen Rider! It belongs to Toei and its creator, Ishinomori Shotaro!

AN: Before we being, there are some things that you should know.

First, this is another trailer fic that I've made. Like Kamen Rider Black, this is another Kingstone Rider. Why am I so fond of Kingstone Riders? Well, I've said before I love Kamen Rider Black (more than RX) and one fact is because of the mysterious Kingstone which powers Kamen Rider Black. In the show, only two Kingstones are shown and I've wondered about the possibility of more than just those two for a while.

Also, the name Seiba isn't really mine, nor is the idea for this Kingstone Rider. I found this Rider on a site called Japan Hero Access, which is unfortunately no longer running. Seiba was a Kingstone Rider, like Black, who suddenly becomes a Rider to fight against monsters. I only remember an organization who had its own Rider, Seiba, and some monsters, that's basically it. I've used what I've remembered and turned it into this. Now, believe it or not, this story is one factor that inspired me to be interested in the idea of multiple Kingstone Rider, therefore I would like to thank the person who came up with Kamen Rider Seiba or else I would not be where I am today.

Now with that said and done, let me show you my trailer.

Kingstone, a gem of great, mystical power...

Two gems, one red, the other green, are presented in a black void of nothingness...

Before its demise, Gorgom withheld two of them; the Stones of the Sun and Moon. These Kingstones would be used to make Kamen Rider Black and his archenemy, Shadow Moon.

The red and green gems are covered in a light of their own respective colors. Then, the lights begin to morph into beings and dies away to reveal the forms of Kamen Rider Black and Shadow Moon.

Unknown to the world, there were more Kingstones than just those two.

Kingstones of multitudes of colors are displayed in different locations all around the world. Some are shown as famous treasures placed in special vaults, while others are placed in temples.

Spread across all around the world are Kingstones lost to the sands of time.

Kingstones are shown floating from their positions and shine brightly.

And someone else wants them very, very badly.

Within a dark room is a man sitting at his desk, watching multiple screens, each one showing the Kingstones. Once seeing the Kingstones shining with energy, the man grins.

Only one can stop this person's obsession with the Kingstones.

A shadowed figure is shown walking the empty streets of Tokyo. His figure is concealed by the darkness of the night as he walks the empty streets of Tokyo towards a lone beam of light.

His name is...

The Rider steps out into the light to reveal himself. He wears a white chestplate over his black bodysuit with Gorgom's symbol etched on the top left hand corner. He has white round shoulder guard, gauntlets and boots, and around his wrists and ankles are green metallic bands. On his round helmet is a pair of antennae protruding from his forehead, a silver mouthguard shaped like the mandibles of a cricket, and a green stripe going down the center of his helmet, between his two green eyes. Around his waist is a white belt with the green Kingstone in the center.

Kamen Rider Seiba!

AN: And that's all I have for now. Now I know the trailer is extremely short, but I've been kind of busy recently and I kind of rushed through it. Still, I want to know think, so please, please leave a review to me know what you thought about it. Also, other authors can adopt this idea if they want to. Just please leave me a review or send me a PM to let me know and we can discuss from there.

That's all-Raika out!

PS: There's a new GARO series coming out! I'm not kidding, go check it out!